https://thispointer.com/pandas-find-duplicate-rows-in-a-dataframe-based-on-all-or-selected-columns-using-dataframe-duplicated-in-python/
https://towardsdatascience.com/finding-and-removing-duplicate-rows-in-pandas-dataframe-c6117668631f
https://www.datacamp.com/community/tutorials/python-select-columns